MAGNETIC ALLOY MATERIAL FOR PRODUCING MAGNETIC RECORDING MEDIUM AND PRODUCTION OF MAGNETIC RECORDING MEDIUM

• Main Authors: ARAI HITOSHI, OKAYAMA HIROSHI, IZUMI TOSHIAKI
• Format: Patent
• Language: English
• Published: 13.12.1986
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRICITY; INDUCTANCES; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAGNETS; METALLURGY; PHYSICS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSFORMERS

PURPOSE:To make the composition of a magnetic thin film uniform by forming the magnetic thin film by a vapor-phase coating method with a magnetic alloy material contg. cobalt and chromium and having <=3mm particle diameter as the vaporization source. CONSTITUTION:A magnetic alloy material contg. cobalt and chromium and having <=3mm particle diameter is used as the vaporization source and the material is coated by vapor-phase coating method on a substrate to form a magnetic thin film. The content of chromium is regulated to 18-23wt.%. The control of the composition when the film is formed becomes difficult at >3mm particle diameter. Consequently, the composition of the magnetic thin film is made uniform and stabilized electromagnetic transducing characteristics can be obtained.